Research On Urban Rail Traffic Congestion Propagation Mechanism

In 2017,there are some rail transit at 34 cities in China.Some cities such as Beijing,Shanghai,Guangzhou and Shenzhen have formed a network scale.Tianjin,Nanjing,Chongqing,Wuhan and other cities are vigorously developing rail transit,so the development of Chinese rail transit has become the age of networking.Networked operations can greatly improve rail transit services and improve the convenience of passengers.However,large passenger traffic will put enormous pressure on rail transport operators.Oversized passenger traffic will cause congestion,which will reduce the operational efficiency of rail transit and increase security risks.Therefore,it is an important issue to study urban rail traffic congestion.In this paper,taking the urban rail transit network passenger flow as the starting point,it is firstly studied that the spatial and temporal distribution characteristics of urban rail transit network passenger flow.In terms of time distribution characteristics,study the distribution of passenger flow on the day,distribution of weekly passenger flow,and distribution of transient passenger flow;In terms of spatial distribution characteristics,study the distribution of passenger flow on the route,the distribution of passenger flow in the upstream and downstream directions,the passenger flow distribution in the segment,and the distribution of the number of passengers and passengers in the station aspect.After that,based on the characteristics of rail transit stations and stations,the conditions for determining congestion at the station are studied.And put forward the meaning of the organization of passenger flow.Using complex networks,scientific systems can be used to study urban rail transit networks.First of all,the topological structure of the rail transit network is analyzed to study its statistical characteristics to examine the characteristics of the rail transit network.Then based on the complex network dynamics model,combined with the actual characteristics of rail transit,a reasonable rail traffic congestion propagation model is proposed.Analyze the important parameters in the model such as the speed of propagation and speed of recovery,and fully understand the characteristics of rail transit.The interior of the rail transit station is a complex system.The facilities and equipments work together.The manager can guide the organization of passenger flow to limit the number of passengers entering the platform.Therefore,this paper proposes a station coordinated current limiting scheme under congested conditions,and verifies the rationality of the scheme through an examle analysis.